First let's have a quick view at the Flash Layout ​with the stock firmware and after OpenWrt has been installed. When you later want to understand, what the programs ''​mtd'' ​and ''​sysupgrade''​ do, have a second look here:

+

Please check out the article [[doc:​techref:​Flash.Layout]]. It contains an example ​and a couple of explanations.

Follow these steps to make a backup of the original firmware (before installing openwrt). Note you may need a Linux based OS installed at your computer to run some commands like **dd**.

+

- Download the openwrt RAM firmware version [[https://​docs.google.com/​uc?​export=download&​id=0B-EMoBe-_OdBcGMxOE5DZjg4WlE|ram-firmware.elf]],​ it will be fully loaded in the RAM without writing in the flash chip and therefore it allows to backup the original firmware

+

- Install a TFTP server in your computer, and check it works ok. Copy ram-firware.elf file into the TFTP's server directory.

+

- Plug the ethernet cable from your computer to the ETH0 port at the router, your computer must have a compatible IP with CFE, for example use **192.168.1.35**

+

- Connect the [[#Serial|serial port]] at the router to your computer (3.3V ttl adapter required), and a run console software utility(putty,​ Cutecom or Hyperterminal) to comunicate with CFE.

+

- Plug the router'​s power source and look at the serial console, press any key to break into CFE. Now it's time to run the ram firmware, execute this command into the CFE command line <​code>​r 192.168.1.35:​ram-firmware.elf</​code>​and wait few second until openwrt loads.

Done, the firmware should be transfered to your computer: **telsey-firmware_backup.bin**

-

+

-

mtd0: 00010000 00010000 "​CFE"​

+

-

+

-

mtd1: 000dff00 00010000 "​kernel"​

+

-

+

-

mtd2: 00300000 00010000 "​rootfs"​

+

-

+

-

mtd3: 00150000 00010000 "​rootfs_data"​

+

-

+

-

mtd4: 00010000 00002000 "​nvram"​

+

-

+

-

mtd5: 003e0000 00010000 "​linux"​

+

==== OEM easy installation ====

==== OEM easy installation ====

-

It seems the reset button doesn'​t work in this router, you may need to connect via serial port to stop CFE and then upload the image via web server:

+

**From OEM firmware**\\

+

* Browse to http://​10.0.0.1:​8063/​

+

* Go to //​Management -> Update Software//​

+

* Select **.bin** firmware and press //Update Software//​

+

* Wait for it to reboot

+

* Telnet to 192.168.1.1 and set a root password, or browse to http://​192.168.1.1 if LuCI is installed.

+

+

**From CFE** (valid for all fimwares)\\

+

It seems the reset button doesn'​t work in this router, you may need to connect via serial port to stop CFE and then upload the image via web server. Alternatively you can shortcircuit TX and RX [[#​serial|]] pins few seconds when turning on the router to enter CFE failsafe mode:

*Browse to http://​192.168.1.1/​

*Browse to http://​192.168.1.1/​

-

*Upload .bin file to router

+

*Upload ​**.bin** file to router

*Wait for it to reboot

*Wait for it to reboot

*Telnet to 192.168.1.1 and set a root password, or browse to http://​192.168.1.1 if LuCI is installed.

*Telnet to 192.168.1.1 and set a root password, or browse to http://​192.168.1.1 if LuCI is installed.

+

==== OEM installation using the TFTP method ====

==== OEM installation using the TFTP method ====

If you want to upgrade using TFTP you follow these steps (as an alternative to the above install process.

If you want to upgrade using TFTP you follow these steps (as an alternative to the above install process.

The board is equiped with a FXS port and a [[http://​www.microsemi.com/​products/​voice-line-circuits/​ve950/​le9581#​overview|Le9581blc]] Digital SLIC chip. However there aren't available FOSS drivers for this part.